Table 1. Characteristics of cases with childhood leukaemia (n=162) and matched controls (n=2125), all registered within 3 months of birth.
|
Any leukaemia
|
ALL
|
Controls
|
||||
|---|---|---|---|---|---|---|
| Characteristics | Mean (s.d.) | No. (%) | Mean (s.d.) | No. (%) | Mean (s.d.) | No. (%) |
| (n=162) | (n=112) | (n=2125) | ||||
| Sex | ||||||
| Male | 83 (51) | 58 (52) | 1086 (51) | |||
| Female | 79 (49) | 54 (48) | 1039 (49) | |||
| Age at diagnosis | ||||||
| 0–4 | 109 (67) | 75 (67) | ||||
| 5–9 | 38 (23) | 26 (23) | ||||
| 10–14 | 15 (9) | 11 (10) | ||||
| GP consultations in the first year of life | ||||||
| At least one consultationa | 152 (94) | 105 (94) | 2023 (95) | |||
| Number of consultations a | 8.8 (7.3) | 9.1 (7.5) | 8.3 (7.0) | |||
| 0–4 | 54 (33) | 33 (29) | 725 (34) | |||
| 5–9 | 48 (30) | 36 (32) | 703 (33) | |||
| 10–14 | 26 (16) | 19 (17) | 388 (18) | |||
| 15–19 | 17 (10) | 13 (12) | 163 (8) | |||
| ⩾20 | 17 (10) | 11 (10) | 146 (7) | |||
| At least one direct consultationb | 152 (94) | 105 (94) | 2016 (95) | |||
| Number of direct consultations b | 8.0 (6.3) | 8.2 (6.4) | 7.5 (6.1) | |||
| 0–4 | 63 (39) | 41 (37) | 800 (38) | |||
| 5–9 | 43 (27) | 30 (27) | 722 (34) | |||
| 10–14 | 28 (17) | 20 (18) | 366 (17) | |||
| 15–19 | 17 (10) | 14 (13) | 135 (6) | |||
| ⩾20 | 11 (7) | 7 (6) | 102 (5) | |||
a
Includes GP surgery consultations, clinic consultations, house calls, phone calls, mail and other administration, and excludes consultations for immunisations.
b
Includes GP surgery consultations, clinic consultations and house calls, and excludes consultations for immunisations.